Your on the right track with your baking soda. An alk level anywhere between 80-125 is good. With a cya level of 40, you'll want to keep your chlorine level between 3 and 6 all the time. Shock level will be 12 - 15 which should get rid of your cc reading. Your ph is OK at 7.2, but if it goes any lower, you'll need to add some Borax to raise it. Ideal is 7.4-7.6, but anywhere between 7.2-7.8 is OK. Calcium level is usually between 200-400, but if this is a vinyl pool, you don't need to worry about that.
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